Heat the milk and melt the butter in it then tip into a bowl - leave to cool. Add
the yeast to the flour, sugar and salt then mix, in liquid. Using your hands,
work everything to a rough but evenly mixed dough.

Cook the sausages and Sweat the onions. (Try to take as much moisture out of onions as possible using kitchen paper)

Cover
and leave for 10 mins, then lightly oil a patch of worktop and knead the
dough for 1 min. Return to the bowl and leave to rise for an hour, if you
can giving it one or two brief kneads during that time.

Take dough and smoosh flat, make it a big sqaure shape. Use a knife to divide into 3 sections, add ketchup mustard onions and sauages (ensure each slice will contain sausage). Cut sides into strippes and fold up.